Brian Nichols is the co-founder of Angel Squad, a community where you’ll learn how to angel invest and get a chance to invest as little as $1k into Hustle Fund's top performing early-stage startups

A startup's pitch deck lands in your inbox. The numbers look amazing. Millions of views on their launch video. Thousands on the waitlist. Revenue climbing month over month.

Everything looks great. Except none of those numbers might mean what you think they mean.

At Hustle Fund, we have reviewed thousands of deals and backed 600+ companies. Along the way, we have gotten pretty good at spotting the difference between metrics that actually signal traction and metrics that just look impressive in a deck. Here are six vanity metrics that regularly trip up investors.

1. The Viral Launch

A startup's product launch goes viral, racking up millions of views and thousands of signups. Exciting, right?

Maybe. But virality is fleeting. The real question is whether those signups are converting into actual users who stick around. We have seen countless launches where the buzz evaporated within weeks and the signup-to-active-user conversion was in the single digits.

What to look for instead: daily and weekly active users (DAU/WAU) and retention rates over time. These tell you whether people are finding real value in the product, not just clicking a link because it showed up in their feed.

2. Flash-in-the-Pan Revenue

Everyone wants to see big revenue numbers. It seems like an obvious sign of demand. But where is that revenue coming from?

Early sales often flow through unscalable channels: the founder's personal network, one-time partnerships, or heavy discounts that destroy margins. The revenue is real, but the source is not repeatable.

What matters more: experimentation across multiple acquisition channels, improving CAC over time, and healthy LTV-to-CAC ratios. You are looking for evidence that the team can generate sales consistently and at scale, not just from channels that will dry up.

3. The Waitlist Mirage

"We have a waitlist of 10,000 people." Sounds impressive until you dig into how that list was built. Giveaways and contests unrelated to the product. Low-friction social media campaigns. Hype-driven marketing without substance. The result is a bloated list of names that may never convert.

The number that actually matters is the waitlist-to-active-user conversion rate. A list of 500 people with a 40% conversion rate is infinitely more valuable than 10,000 names with a 2% conversion rate.

Pro tip: ask about this conversion rate directly. It tells you volumes about real demand.

4. The Niche Engagement Trap

A small but passionate user base can feel like product-market fit. They are posting constantly, engaging deeply, singing the product's praises. But there is a danger in mistaking niche appeal for broad market potential.

A product adored by a small, insular community may struggle to expand beyond that initial group. Scaling requires solving a widespread problem, not just catering to a few passionate early adopters.

Look for signs of expansion beyond the core user base. Growth that does not require excessive hand-holding. Evidence that new users are finding value without the founder personally onboarding each one.

5. The Enterprise Pilot

Enterprise startups love to tout their pilot programs with big-name companies. And those pilots look impressive in a deck. They show the founder is hustling.

But enterprises run pilots all the time. It is how they test new technologies without committing. A pilot is not a contract. A pilot is not recurring revenue. Many pilots quietly end when the test period expires.

What you want to see: conversion rates from pilot to paid contract, the average deal size post-pilot, and whether the enterprise is expanding usage across departments. Those signal real traction.

6. Funding as Validation

It is easy to get excited by big funding rounds and marquee investors. But investor enthusiasm does not equal product-market fit. Sometimes, a massive raise just means the founder is really good at pitching.

Elizabeth Yin has observed that product-market fit is really what matters in the end. She has seen founders who seemingly had less ambition early on but found product-market fit go on to run $100M+ valuation companies. And she has also coached ambitious founders who never found it. Ambition alone does not help unless you have product-market fit.

What actually signals it: organic growth, strong retention, low churn, and customers who refer other customers without being asked. Those metrics cannot be faked.

The Takeaway

It takes practice to tell the difference between metrics that matter and metrics that just look good. As investors, our job is to look past the hype and spot the startups that are making real progress.

Do not be afraid to ask tough questions about retention, engagement, and customer acquisition economics. If you want to sharpen this skill with a community of 2,500+ investors who evaluate deals together regularly, Angel Squad is where Hustle Fund members learn to spot the difference between vanity and value. Check it out at Angel Squad.

The best pitch decks are not the ones with the biggest numbers. They are the ones where the numbers hold up under scrutiny.